Scoring cutter



oct. 25, 1927.

C. S. LENSTON y' Mari/figa C. S. LENSTON SCORING CUTTER Oct: 25,

Filed Nov. 8, 1926 2 Sh'eets-Sheet 2 Patented 257.

CHARLES S. LENSTGN, Gl VJURCESTER', MASSACHUSETTS, ASSGNOR TO HOBBSMANU- FACTURING: GGMANY, OF WGRCESTER, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

SCORING: CUTTER.

Application filed November 8, 1926. Serial No. 1463946.

This invention relates to a rotary cutter for use in connection with aroll for scoring card-board or other inaterial of a similar kind or forslitting or indenting itV as may be desired.

The principal Objects of the invention are to provide a mounting for thecutter in winch the cutter' will be bodily pivoted on an axis at such aheight that the rise and fall of the cutter will not bring it materiallyoutV of registration with its norinal position at the top of the sco ingroll; to provide a inounting for the cutter in winch side play ispractically impossible, due to the construction itself; and to providean iniproved way of adjusting the cutter up .and down about the pivotand securing it in its adjusted positions. f

Other objects and advantages of the invention will appear hereinafter. j

Reference is to be had to the accompanying drawings in which A Fig. l isa sectional view of the cutter bar and scoring roll in which thesupporting means carried Yby the cutter bar is shown in side elevation;

Fig. 2 is a sectional view of the saine on the line 2-2 of Fig. 1;

Fig. 3 is a. transverse sectional view on the line 3-3 of Fig. 2;

Fig. 4l is an end view showing the left hand end in Fig. l; and

Fig. 5 is a central sectional view on the line 5-5 of Fig. 1. j

The cutter bar 10 and scoring roll 11 are of the usual construction wellunderstood iu this art. rlhc cutter bar is provided with a dove-tailedprojection 12 extending longitudinally and the body of the cuttersupporting body 13 is secured on this dove-tail extension at any placealong the cutter bar by ineans of a gib 1st and holding screw 15. Thislines this body in position and it will be understood that as inany ofthese are placed along the cutter bar t ansversely as may be desired toproduce the required number of grooves, slits or rows of indentations inthe card-board C which constitutes the work.

Ordinarily the cutter 16 has been mounted on this body 13 about a` pivotnear the upper right hand cornerJ7 as shown in Fig. l. rlfhe result ofthis was that when the cutter was raised or lowered its point of Contactwith the scoring roll 11was shifted quite mate rially either to theright or left, thus result ing in a tendency to tilt the cardboard outof the horizontal and nialre imperfect work. @ne of the principalobjects of this invention is to avoid this diiliculty and provide forcausing the edge of the cutter always to engage the` surface of theroll, or the cardboard thereon, at practically the same high point,irrespective of wide! variations in ele vation.

For this purpose l provide a pivot stud 18 with its screw and checkscrew at the lower right hand corner of the body 13 and mount upon it ablade holder 19 and filling piece 17. rlhe position of the anis of thispivot stud 13 is a inatter of importance. lt is located half way betweenthe level of the center of the cutter 1G when in its highest and lowestpositions as adjusted in the body 13. ln this way the arc which thecenter of the cutter inales is bisected by a line drawn horizontallythrough the center of the pivot stud 13. Therefore the. position ofthecenter of the cutter 1b' does not change greatly as it goes up and down.Its inaniinuni shift is reduced by one half on account of this location.

lt will be understood that there is a recess in the body 13 forreceiving the cutter and the two parts of the holder 19. This is shownespecially in Fig. 5 where the nieans for holding the cutter 16 inposition is illustrated. |lhe cutter is provided with ball bearings 20,the inner race of" which is ca`r ried by a screw threaded stud 21. Thisstud has the square end of its head and the end of the screw fittingexactly in between the walls of the recess in the body 13 or at leastjust short enough thereof so as to enable it to be put into place. Thescrew threaded end of the stud 21 is provided with a nut 22 which alsohas a square end which can be screwed out just enough against thesurface of the recess in the body 13 to forro a reasonably tightslidino' fit. Then the parts are introduced and tile blade holder cannotshift baclr and forth'in the' machined recess inV which it is located. l

ino

at the top to hold this screw in position and prevent its becomingloosened and insure thatl it will hold up that end of the blade holder.The screw 27 passes through a cylindrical stud 29 located in aytransverse cylindrical opening in the body 13. rIhere isa slit 30extending across this opening from the rear of it to the edge of thebody. This stud 29 is also vprovided with a slit 8l which extends almostallthe way across 1t parallel with the slot 30. There is a bindingscrewBZ for an obvious purpose. j

Supposing the binding screw 32 to` be loosened, the screw 27 is turned.to any desired position to adjust the cutter 16 up or down. Now when theright position is secured, the screw 32 is screwed dcwnV which tightensup the slit 30 and tightens the stud 29 in position, at the same timecompressing that stud a little vwith reference to its slit 3l toitightenit Von the screw 27. It will be obvious therefore that adjustment issecured by one screwanvd the fastening of the cutter in its adjustedposition is secured by the other. This constitutes a very simplearrangement for securing the adjustment of the cutter and it islocatedwith respect to the pivot 18 soft-hat the adjustment itself is'greater than the motion of the cutter. In other words, it1sslightlymagnifiedso that the operator can work more finely. It will Ydescribed, but what I do claim is l. In a scoring device or the like,the combination with a cutter bar and a scoring roll at a distance belowit, of a body adjustable along the under side of the cutter bar andhaving a recess in its bottom, a blade holder mounted within the recessin said y body, Va circular cutter mounted on the blade holder to turnon a transverse axis, the blade holder being pivoted on an axis behindthe cutter midwaybetween the center of the cutter` in its highest andlowest positions, and

means for adjusting the front end of a blade holder up anddown aboutsaid axis, whereby in all adjusted positions the cutter will engage thescoring roll substantially at its top. l

2. In a scoring device, the combination with a cutter bar, of a bodymounted on the bottom thereof andhaving, a recess eXtending upwardlyfrom' the bottom of said body, of a blade holder mounted for verticaladjustment Vwithin said recess, a stud passing through the blade holderand having means upon it for centering a circular cutter and having anut on theother end adapted to be turned to a position in which the headof the bolt and the head of the nut will engage the sides of said recessto locate the cutter ir the body and prevent chattering and side p ay.

3. In a scoring device, the combination with a cutter bar and a bodyladjustably mounted therealong on the bottom, of a blade holder pivotedto said body and located in a recess in the bottomthereof and having acircular blade mounted thereon to rotate freely, said blade holderhavingan upwardly opening recess at the end opposite the pivot, a headedscrew extending into said recess and rotatable therein, means forholding the head of the screw in the recess but allowing it to turntherein,` and means for clamping said screw in adjusted positions. l

t. In a scoring device, the combination with a cutter bar anda bodyadjustably mounted therealong on the bottom, of a blade holder pivotedto said body and located in a recess in the bottom thereof and having acircular blade mounted thereonto rotate freely, said blade holder havingan l' upwardly opening recess at the end opposite the pivot, a screwhaving a head extending into said recess Y and rotatable therein, atransversely slit stud located transversely in said body and having aperforation for receiving said screw freely therethrough, the bodyhaving a slitV parallel with the slit in the stud extending through theopening` in which the stud is located, and means for tightening up theslit in. the body to clamp the body against the stud and the studagainst the screw. f i y 5. In a scoring device,V the combination with abody, of a blade holder pivoted to said body and having a circular blademounted thereon to rotate freely, said blade holder having an upwardlyopening recessv to clamp the screw.

6. In a scc-ring device, the combination of asupporting body' having arecess extending upwardly fron'k the bottom, of a blade nolder pivotedat the rear within said recess, a stud passing through the blade holderand having means upon it for centering a circular cutter and having anut on the other end adapted to be turned to a position in which thehead of the bolt and the head of the nut Will engage the sides' of saidrecess to prevent chattering and side play, and means extending downfrom above into said recess for adjusting said body about said pivot. Intestimony whereof I have hereunto aiixed my signature.

CHARLES S. LENSTON.

